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Vulnerability record · CVE-2021-22636 · published 20 November 2023

CVE-2021-22636: Real-time operating system integer overflow vulnerability

TTi · Real Time Operating System

Texas Instruments TI-RTOS, when configured to use HeapMem heap(default), malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'HeapMem_allocUnprotected' and result in code execution.

7.8 CVSS 3.1 High EPSS 0.28% · top 82.0% CWE-190 · Integer overflow
7.8CVSS 3.1 base score
0.28%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Texas Instruments TI-RTOS, when configured to use HeapMem heap(default), malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'HeapMem_allocUnprotected' and result in code execution.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04 Third Party AdvisoryUS Government Resource
https://www.ti.com/tool/TI-RTOS-MCU Product
https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04 Third Party AdvisoryUS Government Resource
https://www.ti.com/tool/TI-RTOS-MCU Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-22636), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.